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Webmaster Tools is reporting that all of our site's URLs - located www.zuken.com - are "unreachable." The URLs display correctly in all browsers. We recently switched hosting providers, but they assure us there is no security setting that would be causing this issue.

Any ideas? Is this a glitch with Webmaster Tools?

Example:

I want to block this URL (which shows up in Webmaster Tools as an error):

http://www.siteurl.com/news/events-calendar/usa

But not this:

http://www.siteurl.com/news/events-calendar/usa/event-name